|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Magnesium Technology 2017
||Mechanical Properties and Fatigue Strength of Extruded Cobalt-containing Magnetic Magnesium Alloys
||Christian Demminger, Christian Klose
|On-Site Speaker (Planned)
Magnetic magnesium alloys have inherent magnetic properties due to cobalt, which is used as an alloying element here. The magnetic properties mainly originate from Co-rich precipitates and the mechanical properties are significantly influenced by the alloys’ microstructures. Previous works showed comparatively weak mechanical strength of magnetic magnesium specimens produced by gravity die-casting due to the precipitation structure. In this work, the influence of extrusion on the mechanical properties and the microstructure of magnetic magnesium alloys is investigated. Extrusion billets were manufactured from a Mg-Co-Zn alloy by means of a gravity die-casting method. The billets were then extruded to circular bars and a water-air spray cooling was used to affect recrystallization processes during extrusion. Afterwards, the mechanical properties were examined by tensile and rotation-bending tests and correlated with micrographs. For technical applications, the fatigue strength is of major importance, hence the results are discussed and compared with literature.